4.1 General 4 Replacement Procedures
PORTÉGÉ M500 Maintenance Manual (960-559) [CONFIDENTIAL] 4-7
Color of Screw Shaft
To avoid mistakes on the screw length, screw shafts are colored as follows:
Even number length screw: brown
Odd number length screw: white
Special length screw: blue
Screws whose lengths are indicated to one or more decimal places such as 2.5 mm or 2.8 mm.
Marking of Screws on the Computer Body
To make maintenance of the computer easier, markings of the kinds of the screws including
the types and lengths of the screws are indicated on the computer body.
Kind of screws Symbol
BIND screw B
FLAT HEAD screw F
SUPER THIN HEAD screw S
TAPPING screw T
Other screws U
(Unique screws, STUD, etc.)
Examples:
6 mm BIND screw B6
12 mm BIND screw B12
4 mm FLAT HEAD screw F4
(Indicates the screwed length in round number regardless the length of the stud.)